Lock



Jan. 5, 1943.. A. cHEsLER 2,307,110

LOCK Fi-led Deo. 24, 1940 2-SheeiZSSheet l ATTORNEYS Jan. 5, 1943. A. E.cHEsLER l2,307,110

LOCK

Filed DGO. 24, 1940 2 SheetSSht 2 Patented Jan. 5, 1943 UNITED STATESPATENT OFFICE LOCK Abraham E. Chesler, Woodmere, N. Y. ApplicationDecember 24, 1940, Serial No. 371,478

11 Claims.

The present invention relates to door locks of the keyless type used forbed rooms, bath rooms, and the like.

It is among the objects of the invention to provide a keyless door lockwhich may be fabricated at relatively low cost, which may be installedwith a minimum of time, effort and expense, which will not impart strainto the operating or locked parts when attempted to be opened by turningthe outside knob, but which may be conveniently unlocked from theexterior in an emergency by resort to a nail or pick and which can beeffectively locked only by a deliberate operation for the purpose, andif locked when the door is ajar necessarily becomes unlocked on closingor slamming the door.

A feature of the invention is the clutch between the outer door knob,and the latch bolt retracting means operated by the inner door knob,which clutch may be latched in released position to isolate the outerknob from the latch, so that the door cannot be opened by turning theouter knob, since only free and unrestrained turning of said knob ispossible as long as the clutch remains latched open.

Among other features are a push bar clutch release constructionautomatically latched in clutch released position by a spring-pressedplate in the body of the lock, and the tripping of said clutch plate .bythe movement of the latch bolt, so that the lock is released by pushingthe latch bolt inward regardless whether this be done directly byshutting the door, by inserting an emergency nail or the like from theoutside, or by the turning of the inner door knob.

Another feature is the simple installation of the lock by introductionof the body thereof into a hole of larger dimensions through the door,which facilitates the introduction of the unitary protruding latch piecethereof through a smaller cylindrical bore radiating from said hole.

In the accompanying drawings in which is shown one of various possibleembodiments of the several features of the invention,

Fig. 1 is a perspective viewV showing one side of the door lockinstalled,

Fig. 2 is a View in longitudinal cross-section on a larger scale takenon line 2--2 of Fig. 1,

Figs. 3, 4 and 5 are views in transverse crosssection taken respectivelyon the lines 3-3, 4-4

and 5-5 of Fig. 2,

Fig. 6 is a perspective View of the door locking bar,

Fig. 7 is a fragmentary sectional view on a larger scale, taken on theline 'I-'l of Fig. 5,

Fig. 8 is a transverse cross-sectional View taken on line 8-8 of Fig. 2,

Fig. 9 is a perspective View of the latch bolt slide piece,

Fig. 10 is a perspective view of the sleeve on the inner spindle length,

Fig. 11 is a sectional view similar to Fig. 2, but showing only afragment thereof, and indicating the door in locked position,

Fig. l2 is a transverse sectional View taken on line I2-i2 of Fig. 2,

Fig. 13 is a fragmentary detailed view, taken on the line I3--I3 of Fig.3, and

Fig. 14 is a sectional view of a modification in a detail.

The lock includes a body or casing I5 made up of trays I6 and I1 in rimto rim Contact. On the cor of tray I6 rests a slide piece I8 in the formof a yoke having unitary therewith a latch bolt I9 with a head I9. rIhestem 20 of the latch bolt has a peripheral groove 2l straddling ledge 22in the yoke I3, protruding outward laterally through notch 23 in thewall of tray' I B, and urged to outermost position by a coil spring 24encircling said stem and reacting against washer 25 in the casing. Thecover tray Il has a downturned tongue 25 notched to straddle stem 20.

Superposed over the upstanding rim I1 of tray Il, the bottom of whichthus constitutes a partition in the body or casing I5, is a face plate21- of larger diameter. Screws 28 threaded into correspondingly tappedbores in enlargements 29 in both trays I6 and I1 serve to assemble saidtrays and face plate together. The face plate 21 serves as a bearing fora sleeve 33 through which eX- tends a spindle length 3| keyed to thesleeve preferably by a cross-pin 32 kept in position by the inner edgeof said face plate. Over the rim of face plate 21 is snapped theperipheralr flange' of rosette 55. To the outer or protruding end ofsaid spindle length is affixed as for instance, by means -of a set screw33, the inner door knob 34. The sleeve has rigidly or integrally aixedthereto a transversely extending wing piece or lug 35 in the rotary pathof movement of which are upstanding lugs 36 on the slide piece I8, sothat the latch bolt may be retracted by turning the door knob 34.

The tray I6 of the body or casing has a reduced hub 31 at the outside,within which bears a collar member 38, slidably keyed at 39 upon thecompanion spindle length 48, upon the outer end of which is affixed theouter door knob 4I. The spindle lengths 3l and 40 are alignedandv theadjacent ends of collar 38 and sleeve 30 havecoacting clutch teeth 42and 43 respectively. A coil spring 44 encircles collar 38 and reactsagainst the inner end of hub 31 to maintain the clutch normally inclosed position, so that in such position sleeve 33 will turn with doorknob 4I and thus eilect retraction of the latch bolt I9.

Means is provided for releasing at will the connection between outerdoor knob 4i and latch bolt I9. Such means desirably comprises a rod orbar 45 extending lengthwise within the body, having an inturned shiftingconnection 46 at its inner end lodged in a corresponding groove 41 incollar 38 and having a push button 48 threaded upon the exposed endthereof.

Encircling the sleeve 30 and resting upon the oor of tra-y I1 is a flatclutch release latch plate I 49. It is maintained in position againstthe tray I1 by a lock ring 59 fitted in a corresponding groove 5I insleeve 39. A leaf spring 52 reacting between its ends against a pin 53in the tray I1 and at its extremity against a lug 54, urges a tongue 55of plate 49 resiliently against the lateral edge of the clutch releasebar 45. The latter has a notch 59 which enters the plane of the latchplate 49 as the clutch reaches released position, where it is held bythe entry of tongue 55 into said notch under the pressure of spring 52as shown in Figs. 3 and 11. In such position, the door knob 4I at theoutside is disconnected from the latch bolt I9 and can only be turnedfreely and idly without the possibility of opening the door andincidentally without the possibility of exerting strain upon any of theoperating parts.

The door is readily opened by turning the inner knob 34. Wing 35 onsleeve 39 by engagement with lug 36 retracts slide piece I8 and with itthe latch bolt I9. By this operation, the clutch release latch bar 45 isalso tripped, by the arrangement now to be set forth. An upstanding pin51 on the lug 35 of the slide piece I8 protrudes through an aperture 58in the tray I1 into contact with the edge of the clutch release plate49. That plate is provided with an obliquely extending lug 59 across thepath of movement of pin 51. It follows that as the slide yoke I8 of thelatch bolt moves inwardly, that is, toward the left in Fig. 2, the pin51 thereon will cam the latch plate 49 in a counterclockwise directionwhen viewed in Fig. 3, and thereby will move the lug 55 out of notch 56,permitting the coil spring i 44 to snap the collar 38 and with it bar 45to clutch closing position. Upon turning outer knob 4|, the spring 44will bring the collar 38 into clutching registry of teeth 42 with teeth43 on sleeve 30 and further rotation of said knob y Will cause the sameto turn sleeve 3i) for retraction of latch bolt I9 by torque transmittedthrough wing piece 35, in the manner previously set forth.

By reason of the fact that closure of the clutch 42-43 is effectedthrough movement of the latch bolt, the possibility is precluded of aperson locking himself out of the room. In the process of closing orslamming the door, the inward movement of the latch bolt I9 causesshifting of the slide piece I8 and effects tripping of the clutchrelease latch plate 49, should the latter be in latched position.

The lock is applied at a circular hole @Il through the face of the doorand of diameter considerably larger than the dimensions of the body orcasing I5 of the lock.` A smaller cylindricalbore 6I radiates throughthe edge of the door from said hole 60. The pre-assembled lock canreadily be installed by inserting the latch bolt I 9 rst through hole 60into the inner end of lateral bore 6I, whereupon the body will bereadily accommodated in hole 60, and against the latch side thereof.Face plate 21 at the rim of said hole 63 centers the lock in position.An outer face plate 62 to which the spindle length 40 is aflixed by asplit washer 63 is then introduced into the opposite rim of the hole 6Uand secured in position by screws 64. Thereupon the rim of rosette 66 issnapped over that of face plate 62 and the knob 4I is tightened in placeby set screw 4I. Latch bolt I9 may be turned about the axis, so that itsoblique face of its head I9' may be directed either way as required. Theface plate 61 in the edge of the door serves as the guide for themovement of the latch bolt and as a trim therefor.

To permit opening of the locked door from the outside in case of anemergency, there is provided a small aperture 68 in the outer rosette66, registering with an aperture 69 in the outer face plate 62 and withan oblique notch 10 in the base of the slide piece I8, accessiblethrough a corresponding small aperture 1I in the floor of the tray I1.By pushing a nail, pick or similar rigid rod 12 through such apertures,the slide yoke and the attached latch bolt are moved inward, causing thepin 51 thereof to shift the clutch release plate 49 and permittingcollar 38 to snap back into clutched position, so that the door may nowbe readily opened by turning the outer knob 4I. Desirably rosette 66 iskeyed as at S6 with re spect to face plate 62, so as to bring aperture68 in registry with aperture 69.

Desirably, as shown in Fig. 14 the latch rod 20 is displaceabletransversely of its length in the direction of the spindle so that itmay be readily adapted for centering the latch with respect to thethickness of a thicker door. For this purpose the lyoke-shaped slidepiece I3 affords an elongated seat I8 for the latch bolt 20' and thenotch 23' in the wall of tray I5 and the coacting notch in thedownturned tongue 26' of tray |12 are elongated to permit the desiredadjustment in the position of the latch. In the course of installationof the lock in the manner previously described it is clearV that thelatch bolt will automatically shift in the elongated slot 23 and thecoacting slot of tongue 26 for alignment with the corresponding bore ofthe thicker door, and will be maintained in that position by the faceplate corresponding to that shown at 61 in Fig. 2.

As many changes could be made in the above construction, and manyapparently widely different embodiments of this invention could be madewithout departing from the scope of the claimsy it is intended that allmatter contained in the above description or shown in the accompanyingdrawings shall be interpreted as illustrative and not in a limitingsense.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A door lock comprising a body, a laterally protruding spring urgedlatch bolt, a pair of. spindle lengths in aligned relation protrudingrespectively from the outer and the inner faces of the body, each havinga knob aixed thereto, structure within the body encircling the innerspindle length and rigid therewith and having coaction with said latchbolt for retraction thereof upon turning the inner knob, slidable meansincluding a collar keyed to the other spindle length, having clutchconnection to said latch bolt retracting structure, a spring normallymaintaining said clutch connection effective for release of the latchbolt by turning the outer knob, meansfor disconnecting the latter knobfrom the latch bolt, said means comprising a clutch release buttonaccessible from the inner face of the lock and' a connection therefromengaging said collar to slide the latter for disengagement of the clutchand releasable means for maintaining said connection in clutch releasingposition and means interlocked with the inner spindle for tripping saidreleasable means upon turning of the inner door knob.

2. A door lock comprising a body having an inner spindle length and anouter spindle length in axial alignment and'protruding from the oppositefaces thereof, knobs on the respective spindle lengths, a latch boltwithdrawing structure encircling and rigidly xed upon the inner spindle,a collar slidably keyed upon the outer spindle, a coil spring about saidcollar urging the latter against the latch bolt withdrawing structure,said latter elements having coacting teeth for clutch connection, andmeans for rendering said clutch ineffective, said-.means comprising aclutch release bar connected to said collar, protruding from the innerface of the body and adapted to retract said collar against theresistance of said spring and spring urged releasable means forretaining said bar in open clutch position, thereby to disconnect theouter knob from the latch and permit idle rotation thereof and meansconnecting the inner knob to said releasable means for tripping thelatter upon turning said knob.

3. A door lock comprising a body, a door latch bolt protruding laterallytherefrom, a, pair of spindle lengths in aligned relation protrudingrespectively from the inner and the outer face of the lock and eachhaving a door knob secured thereto, a sleeve encircling said innerspindle length and keyed thereto, a slide member within said body,movable as a unit with said latch bolt, means carried by said sleeveengaging said slide member and retracting the latch bolt upon turning ofsaid inner door knob, a collar slidably keyed to said outer spindlelength, the adjacent ends of said collar and said sleeve having coactingclutch teeth, a spring encircling said collar for clutch connectionbetween said collar and said sleeve, a clutch release bar having at itsinner end a shifting connection with said collar and having a pushbutton at its outer end and a spring urged holder for the shiftingconnection adapted to snap into a notch in said bar when in depressedposition, said slide member having means for tripping said holder uponturning of said inner door knob.

4. A door lock comprising a body, a latch bolt protruding laterallytherefrom, aligned spindle lengths protruding from the inner and outerfaces thereof, door knobs affixed thereon, a slide within said bodyrigid with said latch bolt, a sleeve keyed upon said inner spindlelength, coacting lugs upon said sleeve and said slide respectively forretraction of said latch bolt upon turning of said inner knob, a collarkeyed upon said outer spindle length, having tooth clutch coaotion withthe associated end of said sleeve, a spring about said collarmaintaining said clutch effective and clutch release means comprising abar having a shifting connection with said collar and a push buttonaccessible from the inner end of said body, a clutch latch plate springurged against said bar and adapted to snap into a notch in the latterwhen the clutch is fully released thereby, and means carried by saidslide for tripping said latch plate as the latch bolt is beingretracted.

5. In a door lock, a body, a latch bolt having an associated slide piecewithin said body, a spindle length protruding from the inner face of thebody, a door knob affixed thereon, a lug rigid with said spindle lengthengaging said slide piece to withdraw said latch bolt on the turning ofsaid inner spindle length, an outer spindle length aligned with saidinnery spindle length and having a door knob ainxed thereon, a collar onsaid latter spindle length, a toothed clutch connection between saidcollar and said first spindle length, means accessible from the side ofthe inner door knob for releasing said clutch, a retaining means forautomatically locking said releasey means in release position and meansrigid with said slide piece for tripping said" retaining means uponretraction of saidlatch bolt.

6. In a door lock, a body, a latch bolt having an associated slide piecewithin said body, a spindle length protruding from the inner face of thebody, a door knob affixed thereon, a lug rigid with said spindle length,engaging said slidepiece to withdraw said latch bolt on the turning ofsaid inner spindle length, an outer spindle length aligned with saidinner spindle length and having a door knob aiiixed thereon, a collar onsaid latter spindle length, a toothed clutch connection between saidcollar and said first spindle length, means accessible from the innerdoor knob side for releasing said clutch connection, a clutch retainingmeans for locking said means in clutch release position, means rigidwith said slide piece for tripping said clutch retaining means uponretraction of said latch bolt, and emergency means for tripping theclutch retaining means from the outside, said means comprising a smallaperture through the outer face of the body for accommodating a nail orthe like aligned with an oblique notch in the slide piece for displacingthe latter to trip the clutch retaining means.

7. A door lock, including a body adapted to be accommodated in acorresponding hole in the door, a spring urged latch bolt extendinglaterally therefrom and adapted to be accommodated in and to extendthrough a bore in the door radially of said hole, face plates, oneassembled to said body and closing one side of the hole and the otherapart from said body and closing the opposite side of the hole, a sleevebearing in one of said plates, a collar aligned therewith and bearing inthe other of said plates, a spindle length extending through said sleeveand partly through said collar and having a door knob affixed to theexposed end thereof, a second spindle length extending into said collarand keyed thereon and having a door knob affixed on the exposed endthereof, a toothed clutch connection between said sleeve and saidcollar, and a push bar protruding past the inner plate and having ashifting connection to said collar for displacing the latter to openclutch position, means for latching the said bar in the latter positionand means for tripping said bar latching means by turning of the innerdoor knob.

8. A door lock, comprising la body comprising a casing having alaterally protruding latch bolt with a latch head at the outer endthereof, a coil spring about said bolt reacting against said body andurging the bolt to projected position, said rod being freely rotatablein said casing for rendering the latch head effective from either faceof the casing, a slide piece rigid with said latch bolt and lodged insaid body, and alternative means for engaging and shifting said slidepiece to release the bolt, said means including an inner knob spindlehaving a wing thereon, said slide piece having a lug in the path of saidwing as it moves with the turning door knob, an outer door knob,releasable clutch means connecting the latter to said inner spindle foroperating said wing piece, means accessible from the inner side of thelock to shift said clutch to open position, a latch retaining saidclutch in released position and a pin carried by said slide piece fortripping said latch by the movement of said slide piece.

9. A door lock comprising a body having a floor, a slide yoke thereon, alatch bolt unitary therewith protruding laterally therefrom, said yokehaving an upstanding lug, a spindle length extending into said body andhaving an inner door knob aiiixed thereon, a sleeve about said spindlelength, keyed thereto and having a wing in the path of said lug forretracting the slide yoke together with the latch bolt upon turning theinner door knob, an outer spindle having a 'door knob aiXed thereon, acollar slidably keyed to said latter spindle, a toothed clutchconnection between said collar and said sleeve, a coil spring about saidcollar reacting against said body and maintaining said clutch in closedposition to permit retraction of the latch bolt by turning the outerdoor knob, means for releasingsaid clutch to render the outer door knobidle', said means comprising a bar having a shifting connection to saidcollar and a push button at its inner end,

a partition in said body. a latch plate resting on said partition body,a springurging said latch plate against said bar, the latter having anotch into which the latch plate is snapped when the clutch is in openposition, said slide yoke having an upstanding pin protruding throughsaid partition and effective to trip said latch plate as said slidepiece is moved inwardly.

10. A door lock comprising a body composed of a pair of superposedtrays, a latch bolt protruding laterally from said trays, alignedspindle lengths extending from opposite faces of said body, a slidepiece unitary with said latch bolt and mounted in one of said trays, asleeve on the spindle length in the other of said trays, said sleevehaving a wing piece thereon, said slide piece having a lug in the pathof movement of said wing piece, a spring urged collar slidably keyed onthe other spindle, a clutch connection between said sleeve and saidcollar, means for disconnecting said clutch, means encircling saidsleeve and mounted on the floor of the other tray for latching theclutch in released position, said slide piece having an upstanding pinextending through a corresponding slot in the tray thereabove andcoacting with said clutch latching means for freeing the latter upondisplacement of said slide piece.

1l. A door lock comprising a body composed of a latch bolt carrying trayand an associated tray secured thereto in aligned relation, theassociated tray having a lug extending into a corresponding slot in thelatch bolt carrying tray, said lug and slot having complementary bearingnotches, a latch bolt protruding laterally therethrough, a carrying yoketherefor slidably mounted in said latch bolt carrying tray, spindlesprotruding through the opposite faces of said body, a clutch sleeveencircling one of said spindles and lodged in the associated tray,protruding into the latch bolt carrying tray and having a wing piecelaterally thereof in said latter tray, said carrying yoke having a lugin the path of movement of said wing piece, a spring urged collar keyedupon the spindle associated with the latch bolt carrying tray, saidcollar and said sleeve having coacting clutch teeth, a clutch releasingbar extending through said body and straddling said collar for shiftingthe latter to released position, a clutch release latch plate in saidassociated tray about said sleeve, an associated spring urging saidplate against said bar, a latching notch in said bar aligned with saidplate when said bar is in clutch releasing position, and a pin carriedby said carrying yoke;

ABRAHAM E. CHESLER.

